Display apparatus

ABSTRACT

Some of a plurality of image signal lines of a display apparatus according to one embodiment includes: a plurality of bypass wiring portions (bypass wirings) arranged in a frame region so as to have both ends being connected to a plurality of extension wiring portions (extension wirings). The plurality of bypass wiring portions of the plurality of image signal lines include: a plurality of second-layer bypass wirings arranged in a second conductive layer; and a plurality of third-layer bypass wirings arranged in a third conductive layer that is different from a first conductive layer and the second conductive layer. Each of an arrangement pitch between the plurality of second-layer bypass wirings and an arrangement pitch between the plurality of third-layer bypass wirings is smaller than an arrangement pitch between the plurality of image signal lines in a display region.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of U.S. application Ser. No.17/464,677, filed Sep. 2, 2021, which is a continuation of U.S.application Ser. No. 17/165,976, filed Feb. 3, 2021 (now U.S. Pat. No.11,137,654), which is a continuation of International Application No.PCT/JP2019/031424 filed on Aug. 8, 2019 and claims priority to JapanesePatent Application No. 2018-161637 filed on Aug. 30, 2018, the entirecontents of each are incorporated herein by its reference.

TECHNICAL FIELD

The present invention relates to a technique of a display apparatus, andrelates to a technique effectively applied to a display apparatus havinga non-display region not overlapping a pixel in a display region.

BACKGROUND ART

Patent Document 1 (Japanese Patent Application Laid-Open Publication No.2006-343728) describes a display apparatus having a light-blocking unitthat is arranged between an image display unit and a transparent displayunit. Patent Document 2 (U.S. Patent Application Laid-Open PublicationNo. 2017/0123452) describes a display apparatus having a transparentregion that is arranged at a position overlapping a camera.

RELATED ART DOCUMENTS Patent Documents

-   Patent Document 1: Japanese Patent Application Laid-Open Publication    No. 2006-343728-   Patent Document 2: U.S. Patent Application Laid-Open Publication No.    2017/0123452

SUMMARY OF THE INVENTION Problems to be Solved by the Invention

In display apparatuses, there is a demand for increase in occupancy ofan effective display region by reducing an area of a non-display regioninside a display region as small as possible. As part of working forachieving this demand, the inventor of the present application hasstudied a technique for, for example, increasing an area of a displayregion reaching a position surrounding a region of arrangement of acomponent such as a camera. In a planar view, when the region of thearrangement of the component such as the camera exists inside thedisplay region, a layout of a lot of signal wirings that are arranged inthe display region becomes an issue. For example, when a visible-lighttransmittable transparent region is arranged inside the display region,it is necessary to form the layout of the plurality of signal wirings tobypass the transparent region so as not to overlap the transparentregion.

A purpose of the present invention is to provide a technique capable ofimproving a performance of a display apparatus.

Means for Solving the Problems

A display apparatus according to one aspect of the present inventionincludes: a first substrate having a display region, a transparentregion formed inside the display region in a planar view, and a frameregion formed between the display region and the transparent region soas to surround the transparent region along an outer edge of thetransparent region in a planar view; a plurality of scan signal linesformed in a first conductive layer on the first substrate in the displayregion so as to extend in a first direction; and a plurality of imagesignal lines formed in a second conductive layer on the first substratein the display region so as to extend in a second direction crossing thefirst direction. Some of the plurality of image signal lines include: aplurality of extension wiring portions arranged in the display region soas to extend in the second direction; and a plurality of bypass wiringportions arranged in the frame region so as to have both ends beingconnected to the plurality of extension wiring portions. The pluralityof bypass wiring portions of the plurality of image signal linesinclude: a plurality of second-layer bypass wiring portions arranged inthe second conductive layer; and a plurality of third-layer bypasswiring portions arranged in a third conductive layer that is differentfrom the first conductive layer and the second conductive layer. Each ofan arrangement pitch between the plurality of second-layer bypass wiringportions and an arrangement pitch between the plurality of third-layerbypass wiring portions is smaller than an arrangement pitch between theplurality of image signal lines in the display region.

A display apparatus according to another aspect of the present inventionincludes: a display region; a transparent region formed inside thedisplay region in a planar view; a frame region formed between thedisplay region and the transparent region so as to surround thetransparent region along an outer edge of the transparent region in aplanar view; a first substrate having the display region and the frameregion; a plurality of scan signal lines formed in a first conductivelayer on the first substrate in the display region so as to extend in afirst direction; and a plurality of image signal lines formed in asecond conductive layer on the first substrate in the display region soas to extend in a second direction crossing the first direction. Some ofthe plurality of image signal lines includes: a plurality of firstextension wirings arranged in the display region so as to extend in thefirst direction; and a plurality of first bypass wirings arranged in theframe region so as to have both ends being connected to the plurality offirst extension wirings. Some of the plurality of image signal linesincludes: a plurality of second extension wiring portions arranged inthe display region so as to extend in the second direction; and aplurality of second bypass wiring portions arranged in the frame regionso as to have both ends being connected to the plurality of secondextension wiring portions. An arrangement pitch between the plurality offirst bypass wiring portions is larger than an arrangement pitch betweenthe plurality of first extension wiring portions. An arrangement pitchbetween the plurality of second bypass wiring portions is smaller thanan arrangement pitch between the plurality of second extension wiringportions. The frame region includes: a first region which is arrangedadjacent to the transparent region in the first direction and where onepart of each of the plurality of second bypass wiring portions isarranged; a second region which is opposite to the first region acrossthe transparent region in the first direction and where the other partof each of the plurality of second bypass wiring portions is arranged; athird region which is arranged adjacent to the transparent region in thesecond direction and where one part of each of the plurality of firstbypass wiring portions is arranged; and a fourth region which isopposite to the third region across the transparent region in the seconddirection and where the other part of each of the plurality of firstbypass wiring portions is arranged.

BRIEF DESCRIPTIONS OF THE DRAWINGS

FIG. 1 is a plan view of a region of a display surface showing oneexample of a display apparatus according to one embodiment;

FIG. 2 is a cross-sectional view taken along a line A-A of FIG. 1;

FIG. 3 is a circuit diagram showing a circuit configuration example inperiphery of a pixel included in the display apparatus shown in FIG. 1;

FIG. 4 is an enlarged cross-sectional view of a display region of thedisplay apparatus shown in FIG. 2;

FIG. 5 is an enlarged plan view of a first conductive layer in peripheryof a transparent region shown in FIG. 1;

FIG. 6 is an enlarged plan view of a second conductive layer inperiphery of the transparent region shown in FIG. 1;

FIG. 7 is an enlarged plan view of a third conductive layer in peripheryof the transparent region shown in FIG. 1;

FIG. 8 is an enlarged plan view schematically showing a region where aplurality of bypass wiring portions shown in FIGS. 6 and 7 are arranged;

FIG. 9 is an enlarged plan view schematically showing a region where aplurality of bypass wiring portions shown in FIG. 5 are arranged;

FIG. 10 is an enlarged plan view showing a state in which the bypasswirings shown in FIGS. 6 and 7 overlap a “B” portion of FIG. 7;

FIG. 11 is an enlarged plan view showing a state in which the bypasswirings shown in FIGS. 5 and 6 overlap the same position as that of FIG.10;

FIG. 12 is an enlarged cross-sectional view taken along a line A-A ofFIGS. 10 and 11;

FIG. 13 is an enlarged plan view in periphery of a portion connectingthe second conductive layer shown in FIG. 6 and the third conductivelayer shown in FIG. 7;

FIG. 14 is an enlarged plan view of an “A” portion of FIG. 13;

FIG. 15 is an enlarged cross-sectional view taken along a line A-A ofFIG. 14;

FIG. 16 is an enlarged plan view showing a planar shape of a sealingmember arranged in the frame region in periphery of the transparentregion shown in FIG. 1;

FIG. 17 is an enlarged cross-sectional view taken along a line A-A ofFIG. 16;

FIG. 18 is an enlarged plan view of the second conductive layer inperiphery of the transparent region included in a display apparatusaccording to a modification example of FIG. 6;

FIG. 19 is an enlarged plan view schematically showing a region where aplurality of bypass wiring portions shown in FIG. 18 are arranged;

FIG. 20 is an enlarged plan view schematically showing a region where aplurality of bypass wiring portions of the first conductive layer of thedisplay apparatus shown in FIG. 18 are arranged; and

FIG. 21 is an enlarged cross-sectional view showing a modificationexample of FIG. 12.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, each embodiment of the present invention will be describedwith reference to the accompanying drawings. Note that only one exampleis disclosed, and appropriate modification with keeping the concept ofthe present invention which can be easily anticipated by those who areskilled in the art is obviously within the scope of the presentinvention. Also, in order to make the clear description, a width, athickness, a shape, and others of each portion in the drawings areschematically illustrated more than those in an actual aspect in somecases. However, the illustration is only an example, and does not limitthe interpretation of the present invention. In the presentspecification and each drawing, similar elements to those describedearlier for the already-described drawings are denoted with the same orsimilar reference characters, and detailed description for them isappropriately omitted in some cases.

In the following embodiments, a liquid crystal display apparatus havinga liquid crystal layer that is an electrooptic layer will beenexemplified as the display apparatus for explanation. However, thefollowing techniques explained are applicable to not only the liquidcrystal display apparatus but also various modification examples. Forexample, the electrooptic layer may be a layer including an elementhaving an optical property that is changeable when being applied withelectrical energy, such as not only a liquid crystal layer but also anorganic luminous element layer, an inorganic luminous element layerincluding a micro LED, a MEMS (Micro Electro Mechanical Systems)shutter, an electrophoretic element layer or others.

In the present application, terms such as a wiring width, an arrangementpitch, a wiring density and others are used for a plurality of wirings(scan signal lines and image signal lines described later) that arearranged so as to be adjacent to each other in a planar view. Theabove-described terms are defined as follows. The wiring width is alength of the wiring in a direction that is orthogonal to an extensiondirection (longitudinal direction) of the wiring. The arrangement pitchis a center-to-center distance between the wirings that are adjacent toeach other. The wiring density is an occupancy ratio of a conductivepattern configuring the wiring per unit area. The wiring density isdefined by a relation between the wiring width and the arrangement pitch(the center-to-center distance). In other words, when the wiring widthhas a constant value, the wiring density is in inverse proportion to thearrangement pitch. When the arrangement pitch has a constant value, thewiring density is in proportion to the wiring width. A separate distancebetween the wirings is a distance between the adjacent wirings. Notethat each of the plurality of wirings has a trapezoidal cross-sectionalshape as a cross section in the width direction. In this case, theseparate distance between the adjacent wirings means a distance betweenbase sides of the trapezoids of the respective adjacent wirings. Thewiring width means a length of the base side of the trapezoid of thewiring. In the present specification, a term of “line and space” is usedoften. A line of the “line and space” means the wiring width, and aspace of the same means the separate distance.

The liquid crystal display apparatuses are roughly classified into thefollowing two types depending on an application direction of an electricfield for use in changing alignments of liquid crystal molecules of aliquid crystal layer. That is, a first type is so-called verticalelectric field mode that applies the electric field in a thicknessdirection (or an out-of-plane direction) of the display apparatus. Thevertical electric field mode includes, for example, a TN (TwistedNematic) mode, a VA (Vertical Alignment) mode and others. A second typeis so-called horizontal electric field mode that applies the electricfield in a planar direction (or an in-plane direction) of the displayapparatus. The horizontal electric field mode includes, for example, anIPS (In-Plane Switching) mode, a FFS (Fringe Field Switching) mode thatis one of the IPS modes and others. The following techniques explainedis applicable to both the vertical electric field mode and thehorizontal electric field mode. However, in embodiments explained below,the display apparatus of the horizontal electric field mode will beexemplified for explanation.

First Embodiment

<Configuration of Display Apparatus>

First, a configuration of the display apparatus will be explained. FIG.1 is a planar view of a region of a display surface as one example ofthe display apparatus of the present embodiment. In FIG. 1, each of aboundary between the display region DA and the peripheral region PFA, aboundary between the display region DA and the frame region FRA and aboundary between the frame region FRA and the transparent region TRA isillustrated with a dashed double-dotted line. In FIG. 1, a region wherea sealing member SLM is arranged is illustrated with a dot pattern. FIG.2 is a cross-sectional view taken along a line A-A of FIG. 1. Although aplurality of conductive layers and insulating layers in addition to theliquid crystal layer LQ exist between a substrate 10 and a substrate 20as shown in FIG. 4 described later, illustration of these layers isomitted in FIG. 2. FIG. 3 is a circuit diagram showing an example of acircuit configuration in periphery of a pixel included in the displayapparatus shown in FIG. 1. FIG. 4 is an enlarged cross-sectional view ofthe display region of the display apparatus shown in FIG. 2. In FIG. 4,in order to show an example of positional relation between a scan signalline GL and an image signal line SL in a thickness direction of thesubstrate 10 (a “Z” direction shown in FIG. 4), the scan signal line GLthat is arranged on a different cross section from that of FIG. 4 isillustrated with a dotted line.

As shown in FIG. 1, the display apparatus DSP1 of the present embodimentincludes the display region DA. In the display region DA, an image isformed in accordance with an input signal that is supplied from outside.The display region DA is an effective region where the display apparatusDSP1 displays the image in a planar view in which the display surface isviewed. The display apparatus DSP1 includes the peripheral region(non-display region) PFA in periphery of the display region DA in aplanar view. While the display apparatus DSP1 includes the peripheralregion PFA I n periphery of the display region DA, a display apparatusincluding a display region DA reaching an edge is also exemplified as amodification example. The techniques described below are also applicableto the display apparatus of such a type including the display region DAreaching the edge of the display apparatus. While the display region DAof the display apparatus DSP1 shown in FIG. 1 is rectangular, thedisplay region may be not rectangular but polygonal or circular. Forexample, each of four corners of the display region DA is rounded insome cases.

The display region DSP1 also includes the transparent region TRA and theframe region FRA inside the display region DA in a planar view. Theframe region FRA surrounds the transparent region TRA along an outeredge of the transparent region TRA in a planar view, and is between thedisplay region DA and the transparent region TRA. The frame region FRAis shielded from the light by a light-blocking film BM described later,and the frame region FRA is also referred to as a “light-blockingregion”. The transparent region TRA is a region where a component suchas a camera attached to the display apparatus DSP1 is arranged. Thetransparent region TRA is formed so as to transmit visible light inorder to emit the visible light to the component such as the camera. Ina substrate and a polarizer configuring the display apparatus, forexample, an opening is formed in the transparent region TRA.Alternatively, in the transparent region TRA, a visible-lighttransmittable member is arranged but a light-blocking member such as ametal wiring is not arranged. In the transparent region TRA and theframe region FRA, note that components such as a microphone and aspeaker may be arranged in addition to the camera.

As shown in FIG. 2, the display apparatus DSP1 includes the substrate 10and the substrate 20 that are bonded to each other through the liquidcrystal layer LQ so as to face each other. The substrate 10 and thesubstrate 20 face each other in the thickness direction (Z direction) ofthe display apparatus DSP1. The substrate 10 has a front surface (mainsurface, plane) 10 f that faces the liquid crystal layer LQ (and thesubstrate 20). And, the substrate 20 has a back surface (main surface,plane) 20 b that faces the front surface 10 f of the substrate 10 (andthe liquid crystal layer LQ). The substrate 10 is an array substrate inwhich a plurality of transistors (transistor elements) Tr1 (see FIG. 3)functioning as switching elements (active elements) are arranged in anarray form. The substrate 20 is a substrate that is formed in a regioncloser to the display surface. The substrate 20 can be also referred toas an opposed substrate meaning a substrate that is arranged to face thearray substrate.

The liquid crystal layer LQ is between the front surface 10 f of thesubstrate 10 and the back surface 20 b of the substrate 20. The liquidcrystal layer LQ is an electrooptic layer that controls a state oftransmittance of the visible light. This has a function of modulatinglight that travels through itself by controlling a state of an electricfield that is formed around the liquid crystal layer LQ through theswitching element. The display region DA included in the substrate 10and the substrate 20 overlaps the liquid crystal layer LQ as shown inFIG. 2.

The substrate 10 and the substrate 20 are bonded to each other through asealing member (adhesive member) SLM. As shown in FIG. 1, the sealingmember SLM is arranged in the peripheral region PFA so as to surroundthe display region DA. As shown in FIG. 2, the liquid crystal layer LQis inside the sealing member SLM. The sealing member SLM plays a role ofa sticker for sealing the liquid crystal between the substrate 10 andthe substrate 20. Besides, the sealing member SLM plays a role of anadhesive member for adhering the substrate 10 and the substrate 20.

The display apparatus DSP1 includes an optical device OD1 and an opticaldevice OD2. The optical device OD1 is arranged between the substrate 10and a backlight unit BL. The optical device OD2 is arranged in a regioncloser to the display surface of the substrate 20, in other words, isopposite to the substrate 10 across the substrate 20. Each of theoptical device OD1 and the optical device OD2 includes at least apolarizer, and may include a waveplate if needed. As described above, inthe transparent region TRA, the optical devices OD1 and OD2 that can beobstructive factors for transparency are not formed. More specifically,an opening is formed in the optical devices OD1 and OD2 so as to extendalong a shape of the transparent region TRA.

The display apparatus DSP1 includes a cover member CVM (see FIG. 2) thatcovers the region closer to the display surface of the substrate 20. Thecover member CVM faces the front surface (plane) 10 f opposite to theback surface (plane) 20 b of the substrate 20. In other words, the covermember CVM faces the front surface (plane) 20 f opposite to the backsurface (plane) 20 b of the substrate 20. The substrate 20 is betweenthe cover member CVM and the substrate 10 in the Z direction. The covermember CVM is a protective member that protects the substrates 10 and 20and the optical device OD2, and is arranged in the region closer to thedisplay surface of the display apparatus DSP1. However, as amodification example of the present embodiment, a case without the covermember CVM is exemplified in some cases.

Each of the substrate 10 and the substrate 20 is a transparent platehaving visible-light transmittable property (that is characteristics forallowing the visible light to penetrate). As the substrate that is thetransparent plate, a glass substrate can be exemplified. As aconstituent material of each of the substrate 10 and the substrate 20, aresin material (visible-light transmittable resin material) containing apolymer such as polyimide, polyamide, polycarbonate, polyester or otherscan be also used. In the case of the substrate made of the resinmaterial such as polyimide, the substrate has flexibility. When thesubstrate 10 has flexibility, a part (such as the peripheral region PFA)of the substrate 10 can be curved or bent. When the substrate 10 and thesubstrate 20 have flexibility, an area of the peripheral region PFA in aplanar view can be reduced. In this case, an occupancy of an effectivedisplay region in a planar view can be increased.

As shown in FIG. 3, a plurality of pixels PX are arranged in the displayregion DA. In the example shown in FIG. 3, each of the plurality ofpixels PX has a plurality of subpixels PXs. The plurality of subpixelsPXs include subpixels PXs for, for example, red, blue and green. Bycontrol for a color tone of the plurality of subpixels PXs, a colorimage can be displayed. The number of types of the subpixels PXsconfiguring one pixel PX is not only three exemplified in FIG. 3, andvarious modification examples are applicable.

Each of the plurality of subpixels PXs includes a transistor Tr1 that isa switching element for controlling the turning ON/OFF of the electricfield applied on the liquid crystal layer LQ. The transistor Tr1controls an operation of the subpixel PXs. As described later, thetransistor Tr1 is a thin film transistor (TFT) that is formed on thesubstrate 10.

As shown in FIG. 3, the display apparatus DSP1 includes a plurality ofscan signal lines GL extending in an X direction in the display regionDA and a plurality of image signal lines SL extending in a Y directionthat crosses (in FIG. 3, that is orthogonal to) the X direction in thedisplay region DA. The scan signal line GL is a gate line that isconnected to a gate of the transistor Tr1. The image signal line SL is asource line that is connected to a source of the transistor Tr1. Each ofthe plurality of scan signal lines GL extends in the X direction, and isarrayed with, for example, an equal interval therebetween in the Ydirection. Each of the plurality of image signal lines SL extends in theY direction, and is arrayed with, for example, an equal intervaltherebetween in the X direction.

Each of the plurality of scan signal lines GL is connected to a scandriving circuit (gate driving circuit) GD. A scan signal Gsi that isoutput from the scan driving circuit GD is input to the gate of thetransistor Tr1 through the scan signal line GL. Each of the plurality ofimage signal lines SL is connected to an image-signal driving circuitSD. An image signal Spic that is output from the image-signal drivingcircuit SD is input to the source of the transistor Tr1 through theimage signal line SL.

Each of the plurality of image signal lines SL is connected to a pixelelectrode PE through the transistor Tr1. More specifically, the imagesignal line SL is connected to the source of the transistor Tr1, and thepixel electrode PE is connected to a drain of the transistor Tr1. Whenthe transistor Tr1 is being turned ON, the image signal Spic is suppliedfrom the image signal line SL to the pixel electrode PE. The pixelelectrode PE is connected to a common electrode CE through a dielectriclayer (a capacitance element CS shown in FIG. 3). To the commonelectrode CE, a fixed potential is supplied from a common-potentialsupplying circuit CD. The fixed potential that is supplied to the commonelectrode CE is a common potential among the plurality of subpixels PXs.In a display period, the electric field is formed in each subpixel PXsin accordance with a potential difference between the potential that issupplied to the common electrode CE and the potential that is suppliedto the pixel electrode PE, and liquid crystal molecules contained in theliquid crystal layer LQ are driven by this electric field.

Each of the scan driving circuit GD, the image-signal driving circuit SDand the common-potential supplying circuit CD shown in FIG. 3 may be acircuit that is mounted on a driver IC chip (CB1) that is formed in theperipheral region PFA shown in FIG. 1 or formed in a wiring substrateFWB1 connected to the peripheral region PFA, or may be formed as aninternal circuit in the substrate 10. Although not described in detail,the wiring substrate FWB1 is connected to a plurality of terminals TM1that are formed in the substrate 10.

As shown in FIG. 4, a plurality of conductive layers CL1 to CL5, aplurality of insulating films 11 to 16 and an alignment film AL1 areformed between the substrate 10 and the liquid crystal layer LQ. Theplurality of conductive layers CL1 to CL5, the plurality of insulatingfilms 11 to 16 and the alignment film AL1 are formed on the frontsurface 10 f of the substrate 10. A light-blocking film BM, colorfilters CFR, CFG and CFB, an insulating film OC1 and an alignment filmAL2 are formed between the substrate 20 and the liquid crystal layer LQ.The light-blocking film BM, the color filters CFR, CFG and CFB, theinsulating film OC1 and the alignment film AL2 are formed on the backsurface 20 b of the substrate 20.

In each of the conductive layers C11, CL2 and CL3 shown in FIG. 4, ametallic conductor pattern (metallic wiring) is formed. Each of theconductive layer CL1 and the conductive layer CL3 includes a metallicfilm made of, for example, a metal such as molybdenum (Mo) or tungsten(W) or an alloy of such a metal. The conductor pattern of the conductivelayer CL2 includes a metallic film having, for example, a multilayerstructure such as a layered film made of an aluminum (Al) filmsandwiched by a titanium (Ti) film, a titanium nitride (TiN) film orothers. Each of the conductive layer CL4 and the conductive layer CL5mainly includes a conductive oxide material (transparent conductivematerial) such as ITO (Indium Tin Oxide), IZO (Indium Zinc Oxide) orothers.

An insulating film intervenes between the conductive layers CL1 to CL5,respectively. An insulating film 11 and an insulating film 12 intervenesbetween the conductive layer CL1 and the substrate 10. An insulatingfilm 13 intervenes between the conductive layer CL1 and the conductivelayer CL2. An insulating film 14 intervenes between the conductive layerCL3 and the conductive layer CL4. An insulating film 15 intervenesbetween the conductive layer CL4 and the conductive layer CL5. Thealignment film AL1 intervenes between the conductive layer CL5 and theliquid crystal layer LQ. Each of the insulating films 11, 12, 13 and 16is an inorganic insulating film. As the inorganic insulating film, forexample, a silicon nitride (SiN) film, a silicon oxide (SiO) film, analuminum oxide (AlOx) film or a layered film made of such films can beexemplified. Each of the insulating film 14 and the insulating film 15is an organic insulating film. When an insulating film made of anorganic material is formed to be thicker than an insulating film made ofan inorganic material, an upper surface (front surface) can beplanarized. Each of the insulating film 14 and the insulating film 15 isused as a planarizing film for planarizing surface unevenness of theconductor pattern formed in a lower layer. Therefore, a thickness ofeach of the insulating film 14 and the insulating film 15 is larger thanthat of each of the insulating films 11, 12 and 13 that are theinorganic insulating films. As an example of the organic insulatingfilms, an acrylic-based light-sensitive resin or others can beexemplified.

Each of the plurality of scan signal lines GL is formed in theconductive layer CL1 above the substrate 10. The insulating film 11 andthe insulating film 12 are layered on the substrate 10, and the scansignal line GL is formed on the insulating film 12. Each of theplurality of image signal lines SL is formed in the conductive layer CL2above the substrate 10. The insulating films 11, 12 and 13 are layeredon the substrate 10, and the image scan signal line SL is formed on theinsulating film 13.

A semiconductor layer of the transistor (transistor element) Tr1 shownin FIG. 3 is formed between the insulating film 11 and the insulatingfilm 12. Since the semiconductor layer is on a cross section that isdifferent from FIG. 4, the semiconductor layer is not illustrated inFIG. 4. A source region of the semiconductor layer is electricallyconnected to the image signal line SL formed in the conductive layerCL2. A drain region of the semiconductor layer is electrically connectedto the pixel electrode PE formed in the conductive layer CL5. In aplanar view, the scan signal line GL extends in a gap between the sourceregion and the drain region of the semiconductor layer. The scan signalline GL overlaps a channel region of the semiconductor layer, andfunctions as the gate electrode of the transistor Tr1. The insulatingfilm 12 that intervenes between the channel region and the scan signalline GL functions as a gate insulating film. As seen in the exampledescribed above, a TFT that is structured so that the gate electrode isarranged on an upper side of the channel region of the transistor Tr1 iscalled top gate mode. However, there are various modification examplesof the TFT mode. For example, a bottom gate mode in which the gateelectrode is arranged on a lower side of the channel region may be used.Alternatively, a mode in which the gate electrode is arranged on boththe upper and lower sides of the channel region is also exemplified.

A wiring MW3 is arranged in the conductive layer CL3. The wiring MW3 isa metallic wiring made of a metal as similar to the scan signal line GLand the image signal line SL. The wiring MW3 is arranged at a positionoverlapping the image signal line SL in the thickness direction (Zdirection). The wiring MW3 is electrically connected to the commonelectrode CE that is formed in the conductive layer CL4. In this case,the wiring MW3 can be used as a wiring for supplying a potential to thecommon electrode. Alternatively, when the display apparatus DSP1 has atouch panel function, the wiring MW3 is used as a signal transmissionpath in which a driving signal or a detection signal for use indetection of a touch position is transmitted.

In the conductive layer CL4, the common electrode CE is formed. Thecommon electrode CE is formed on the insulating film 15 that is theplanarizing film. FIG. 4 shows one common electrode CE. However, in thedisplay region DA shown in FIG. 1, a plurality of common electrodes CEmay be arranged so as to separate from one another. And, as describedabove, to the common electrode CE, the common potential among theplurality of subpixels PXs is supplied. Therefore, as shown in FIG. 4,the common electrode CE may be formed all over the plurality ofsubpixels PXs.

In the conductive layer CL5, a plurality of pixel electrodes PE areformed. The insulating film 16 that is the inorganic insulating filmintervenes between the conductive layer CL5 where the pixel electrodesPE are formed and the conductive layer CL4 where the common electrode CEis formed. This insulating film 16 functions as the dielectric layer toform the capacitance element CS shown in FIG. 3.

The plurality of pixel electrodes PE are covered with the alignment filmAL1. The alignment film AL1 is the organic insulating film having afunction of unifying initial alignments of liquid crystal moleculescontained in the liquid crystal layer LQ, and is made of, for example, apolyimide resin. The alignment film AL1 is in contact with the liquidcrystal layer LQ.

As shown in FIG. 4, a light-blocking film BM, color filters CFR, CFG andCFB, an insulating film OC1 and an alignment film AL2 are formed on theback surface (main surface, plane) 20 b of the substrate 20.

The color filters CFR, CFG and CFB are formed in a region closer to theback surface 20 b that faces the substrate 10. In the example shown inFIG. 3, the color filters CFR, CFG and CFB of three colors that are red(R), green (G) and blue (B) are periodically arranged. In the colordisplay apparatus, a color image is displayed by grouping, for example,the three-color pixels of the red (R), the green (G) and the blue (B)into one set. The plurality of color filtersCFR, CFG and CFB of thesubstrate 20 are arranged at positions facing the respective pixels PX(see FIG. 1) having the respective pixel electrodes PE formed in thesubstrate 10. Note that types of the color filters are not limited tothe three colors that are the red (R), the green (G) and the blue (B).

The light-blocking film BM is arranged boundaries among the colorfilters CFR, CFG and CFB of the respective colors. The light-blockingfilm BM is called black matrix, and is made of, for example, a blackresin or a low-reflective metal. The light-blocking film BM is formed tohave, for example, a grid form in a planar view. In other words, thelight-blocking film BM extends in the X and the Y directions. Morespecifically, the light-blocking film BM has a plurality of portionsextending in the Y direction and a plurality of portions extending inthe X direction crossing the Y direction. Each pixel PX is partitionedby the black matrix, so that light leakage and color mixture can besuppressed.

In the display region DA, the light-blocking film BM overlaps the scansignal line GL, the image signal line SL and the wiring MW3 that are themetal wirings. Since the metal wiring having the light-blocking propertyis arranged at the position overlapping the light-blocking film BM, themetal wiring is difficult to be visually recognized on the displayscreen. On the other hand, at least a part of the common electrode CEand the pixel electrodes PE is arranged at a position not overlappingthe light-blocking film BM. Each of the common electrode CE and thepixel electrodes PX is made of a visible-light transmittable conductivematerial. Therefore, even when the common electrode CE and the pixelelectrodes PE are arranged at the positions not overlapping thelight-blocking film BM, the visible light is not blocked at eachsubpixel PXs by the common electrode CE and the pixel electrodes PE.

The light-blocking film BM is also formed in the peripheral region PFA(see FIG. 1) of the substrate 20. The peripheral region PFA overlaps thelight-blocking film BM. The display region DA is defined as an innerregion of the peripheral region PFA. The peripheral region PFA is aregion overlapping the light-blocking film BM that blocks the light thatis emitted from the backlight unit (light source) BL shown in FIG. 2.While the light-blocking film BM is also formed inside the displayregion DA, the light-blocking film BM in the display region DA is formedto have a plurality of openings. Generally, among the openings which areformed in the light-blocking film BM and from which the color filtersare exposed, an end of an opening that is formed in the closest regionto an edge is defined as a boundary between the display region DA andthe peripheral region PFA.

The insulating film OC1 shown in FIG. 4 covers the color filters CFR,CFG and CFB. The insulating film OC1 functions as a protective film thatprevents impurities from spreading from the color filters to the liquidcrystal layer. The insulating film OC1 is an organic insulating filmmade of, for example, an acrylic-based light-sensitive resin or others.

The insulating film OC1 is covered with the alignment film AL2. Thealignment film AL2 is an organic insulating film having a function ofunifying the initial alignments of the liquid crystal moleculescontained in the liquid crystal layer LQ, and is made of, for example, apolyimide resin. The alignment filmAL2 is in contact with the liquidcrystal layer LQ.

<Details of Periphery of Transparent Region TRA>

Next, a periphery of the transparent region TRA shown in FIG. 1 will beexplained in detail. FIG. 5 is an enlarged planar view of a firstconductive layer in the periphery of the transparent region shown inFIG. 1. FIG. 6 is an enlarged planar view of a second conductive layerin the periphery of the transparent region shown in FIG. 1. FIG. 7 is anenlarged planar view of a third conductive layer in the periphery of thetransparent region shown in FIG. 1.

As shown in FIG. 5, each of the plurality of scan signal lines GLextends in the X direction inside the display region DA. As shown inFIG. 6, each of the plurality of image signal lines SL extends in the Ydirection inside the display region DA. As shown in FIG. 3, one subpixelPXs is formed at one cross point at which the scan signal line GL andthe image signal line SL cross each other.

In this case, when the transparent region TRA is arranged inside thedisplay region DA as shown in FIG. 5, the transparent region TPA isarranged on an extension line of an extension wiring portion(scan-signal extension wiring portion) GLr of some of the plurality ofscan signal lines GL that linearly extend in the X direction. Similarly,when the transparent region TRA is arranged inside the display region DAas shown in FIG. 6, the transparent region TRA is arranged on anextension line of an extension wiring portion (image-signal extensionwiring portion) SLr of some of the plurality of image signal lines SLthat linearly extend in the Y direction. However, in order to improvethe visible-light transmittable property of the transparent region TRA,it is preferable not to overlap the scan signal lines GL and the imagesignal lines SL that are the metallic wirings with the transparentregion TRA. In the present application, a portion of each of the some ofthe scan signal lines GL and the image signal lines SL, the portionextending in one direction, is referred to as the extension wiringportion, and a portion thereof that avoids and bypasses the transparentregion TRA is referred to as a bypass wiring portion. However, the termof “wiring portion” may be also simply referred to as “wiring”. Forexample, even when the “extension wiring portion” is simply referred toas the “extension wiring” and even when the “bypass wiring portion” issimply referred to as the “bypass wiring”, the meaning is the same.

Meanwhile, in order to use a region in the periphery of the transparentregion TRA as the display region, it is necessary to avoid disconnectionof the scan signal lines GL and the image signal lines SL near thetransparent region TRA.

In the case of the display apparatus DSP1 of the present embodiment, asshown in FIG. 5, some of the plurality of scan signal lines GL have aplurality of extension wiring portions (scan-signal extension wiringportions) GLr that are arranged in the display region DA so as to extendin the X direction and a plurality of bypass wiring portions GLc thatare arranged in the frame region FRA of the conductive layer CL1 so asto have both ends being connected to the plurality of extension wiringportions GLr. The bypass wiring portion GLc is a wiring that causes thetransmission path for the scan signal to bypass along an outer edge ofthe transparent region TRA. In the present application, the bypasswiring portion GLc making up the transmission path for the scan signalis referred to as scan-signal bypass wiring portion in some cases. Inthe present application, the bypass wiring portion GLc is referred to asfirst-layer bypass wiring portion in some cases because of being formedin the conductive layer CL1 that is the first conductive layer. Thebypass wiring portion GLc extends in a different direction from the Xdirection that is the extension direction of the extension wiringportion GLr. In the example shown in FIG. 5, each of the plurality ofbypass wiring portions GLc extends in an arc form along the outer edgeof the circular-shaped transparent region TRA. Each of the plurality ofbypass wiring portions GLc has two ends GLe, and the extension wiringportion GLr is connected to each of the two ends GLe.

In the case of the display apparatus DSP1, as shown in FIG. 6, some ofthe plurality of image signal lines SL have a plurality of extensionwiring portions (image-signal extension wiring portions) SLr that arearranged in the display region DA so as to extend in the Y direction anda plurality of bypass wiring portions SLc2 that are arranged in theframe region FRA of the conductive layer CL2 so as to have both endsbeing connected to the plurality of extension wiring portions SLr. Thebypass wiring portion SLc2 is a wiring that causes the transmission pathfor the image signal to bypass along the outer edge of the transparentregion TRA. In the present application, the bypass wiring portion SLc2making up the transmission path for the image signal is referred to asimage-signal bypass wiring portion in some cases. In the presentapplication, the bypass wiring portion SLc2 is referred to assecond-layer bypass wiring portion in some cases because of being formedin the conductive layer CL2 that is the second conductive layer. Thebypass wiring portion SLc2 extends in a different direction from the Ydirection that is the extension direction of the extension wiringportion SLr. In the example shown in FIG. 6, each of the plurality ofbypass wiring portions SLc2 extends in an arc form along the outer edgeof the circular-shaped transparent region TRA. Each of the plurality ofbypass wiring portions SLc2 has two ends SLe, and the extension wiringportion SLr is connected to each of the two ends SLe.

In this case, the frame region FRA where the bypass wiring portion GLcshown in FIG. 5 and the bypass wiring portion SLc2 shown in FIG. 6 arearranged is different from the display region DA in the arrangement ofthe cross point between the scan signal line GL and the image signalline SL. Therefore, the frame region FRA is difficult to be used as theeffective display region. Therefore, in order to increase the occupancyof the effective display region in a planar view, it is preferable todecrease an area of the frame region FRA. Accordingly, the inventor ofthe present application has studied a technique of decreasing the areathe frame region FRA that surrounds the transparent region TRA.

A lower limit value of the number of the wirings (the scan signal liensGL or the image signal lines SL) that arranged in the frame region FRAis defined by a relation between the area of the transparent region TRAand an arrangement pitch between the wirings in the display region DA.For example, in a case of a planar circular shape of the transparentregion TRA shown in FIG. 5, when a diameter of this circle is 1080 to4050 μm and when the arrangement pitch (center-to-center distance)between the adjacent scan signal lines GL in the display region DA is 54μm, at least 40 to 150 scan signal lines GL are arranged in the frameregion FRA. Also, for example, in a case of the planar circular shape ofthe transparent region TRA shown in FIG. 6, when a diameter of thiscircle is 1080 to 4050 μm and when the arrangement pitch(center-to-center distance) between the adjacent image signal lines SLin the display region DA is 18 μm, at least 120 to 450 image signallines SL are arranged in the frame region FRA.

In the case of the color display apparatus, the image signal lines SLfor a plurality of color types are necessary. In the case of the presentembodiment, the plurality of image signal lines SL shown in FIG. 6include a plurality of image signal lines SLR in which an image signalfor a first color (such as red) is transmitted, a plurality of imagesignal lines SLB in which an image signal for a second color (such asblue) is transmitted, and a plurality of image signal lines SLG in whichan image signal for a third color (such as green) is transmitted. Inthis case, the arrangement pitch between the image signal lines SL issmaller than the arrangement pitch between the scan signal lines GLsince three image signal lines SL are arranged for one pixel. Therefore,the number of the image signal lines SL that are arranged in the frameregion FRA is larger than the number of the scan signal lines GL thatare arranged in the frame region FRA. Therefore, as a factor thatdefines the lower limit value of the area of the frame region FRA, thenumber of the image signal lines SL is more dominant than the number ofthe scan signal lines GL. In a modification example of FIG. 5, note thatthe bypass wiring portion GLc may be not arranged in the frame regionFRA in some cases as described later in the modification example.

In order to decrease the area of the frame region FRA, it is importantto decrease the arrangement pitch between the image signal lines SL thatare arranged in the frame region FRA shown in FIG. 6. In the case of thedisplay apparatus DSP1, the arrangement pitch between the bypass wiringportions of the image signal lines SL that are arranged in the frameregion FRA is smaller than the arrangement pitch between the imagesignal lines SL in the display region DA. For example, in the exampleshown in FIG. 6, an arrangement pitch SLp1 between the image signallines SL in the display region DA is 18 μm. On the other hand, anarrangement pitch SLp2 between the bypass wiring portions SLc2 in theframe region FRA is 4.5 μm. In the case of the display apparatus DSP1,the arrangement pitch SLp2 between the bypass wiring portions SLc2 issmaller than the arrangement pitch SLp1 between the image signal linesSL in the display region DA, and therefore, the area of the frame regionFRA can be decreased.

In the case of the display apparatus DSP1, the bypass wiring portion ofthe image signal line SL is formed in the plurality of conductivelayers. That is, the plurality of bypass wiring portions of theplurality of image signal lines SL include a plurality of bypass wiringportions (second-layer bypass wiring portions) SLc2 that are arranged inthe conductive layer CL2 shown in FIG. 6 and a plurality of bypasswiring portions (third-layer bypass wiring portions) SLc3 that arearranged in a conductive layer (third-conductive layer) CL3 shown inFIG. 7. An arrangement pitch SLp3 between the bypass wiring portionsSLc3 is smaller than the arrangement pitch SLp1 between the image signallines SL in the display region DA of the conductive layer CL2 shown inFIG. 6. The arrangement pitch SLp3 between the bypass wiring portionsSLc3 is, for example, 9 μm.

In a display apparatus DSP2 shown in FIG. 18 described later as amodification example, note that all the bypass wiring portions SLc2 ofthe plurality of image signal lines SL are connected to the conductivelayer CL2 while no bypass wiring portion is arranged in the conductivelayer corresponding to the conductive layer CL3 shown in FIG. 7. Even inthis case, when the arrangement pitch SLp2 between the bypass wiringportions SLc2 is made small, the increase in the frame region FRA can besuppressed. However, in the case of the display apparatus DSP1, the areaof the frame region FRA can be further smaller than that of the displayapparatus DSP2.

FIG. 8 is an enlarged planar view schematically showing a region wherethe plurality of bypass wiring portions shown in FIGS. 6 and 7 arearranged. In the display apparatus DSP1, as shown in FIG. 6, theplurality of bypass wiring portions SLc2 are arranged on both sides ofthe transparent region TRA in the X direction. Similarly, the pluralityof bypass wiring portions SLc3 shown in FIG. 7 are arranged on bothsides of the transparent region TRA in the X direction. In other words,as shown in FIG. 8, the frame region FRA includes a region (firstregion) FRA1 which is arranged adjacent to the transparent region TRA inthe X direction and where one part of each of the plurality of bypasswiring portions SLc2 (see FIG. 6) and the plurality of bypass wiringportions SLc3 (see FIG. 7) is arranged. Also, the frame region FRAincludes a region (second region) FRA2 which is opposite to the regionFRA1 across the transparent region TRA and where the other part of eachof the plurality of bypass wiring portions SLc2 and the plurality ofbypass wiring portions SLc3 is arranged.

As shown in FIG. 8, when the bypass wiring portions SLc2 (see FIG. 6)and SLc3 (see FIG. 7) are arranged on the both sides of the transparentregion TRA in the X direction, the area of the frame region FRA can bemade smaller than that in a case in which the bypass wirings arearranged on only either one side of the transparent region TRA in the Xdirection.

In the case of the display apparatus DSP1, the number of the bypasswiring portions SLc2 (see FIG. 6) that are arranged in the region FRA1shown in FIG. 8 and the number of the bypass wiring portions SLc2 thatare arranged in the region FRA2 are equal to each other. The number ofthe bypass wiring portions SLc3 (see FIG. 7) that are arranged in theregion FRA1 and the number of the bypass wiring portions SLc3 that arearranged in the region FRA2 are equal to each other. In other words, thebypass wiring portions SLc2 and SLc3 are arranged to be well balancedbetween the both sides of the transparent region TRA in the X direction.For example, in the example shown in FIG. 6, each of the number of thebypass wiring portions SLc2 that are arranged in the region FRA1 (seeFIG. 8) and the number of the bypass wiring portions SLc2 that arearranged in the region FRA2 (see FIG. 8) is 18. In the example shown inFIG. 7, each of the number of the bypass wiring portions SLc3 that arearranged in the region FRA1 (see FIG. 8) and the number of the bypasswiring portions SLc3 that are arranged in the region FRA2 (see FIG. 8)is 9. In the examples shown in FIGS. 6 and 7, note that one example ofthe small number of the image signal lines SL is illustrated in order toeasily view the drawings. Therefore, it is needless to say that thereare not only the examples shown in FIGS. 6 and 7 but also variousmodification examples for the number of the image signal lines SL andthe total number of the bypass wiring portions SLc2 and SLc3. Forexample, when 120 to 450 image signal lines SL are arranged in total inthe frame region FRA as described above, there is a case of 40 to 150bypass wiring portions as each of the number of the bypass wiringportions SLc2 that are arranged in the frame region FRA1 and the numberof the bypass wiring portions SLc2 that are arranged in the frame regionFRA2. This case has 20 to 75 bypass wiring portions as each of thenumber of the bypass wiring portions SLc3 that are arranged in the frameregion FRA1 and the number of the bypass wiring portions SLc3 that arearranged in the frame region FRA3.

Since the bypass wiring portions SLc2 and SLc3 are arranged to be wellbalanced, shapes of the region FRA1 and the region FRA2 are axisymmetricwith respect to a center line that goes through a center of thetransparent region TRA in the Y direction. In this case, the region inthe periphery of the transparent region TRA can be effectively used asthe arrangement region for the bypass wiring portions, and therefore,the area of the frame region FRA can be made smaller than that in a caseof the much different numbers of the bypass wiring portions in the frameregions FRA1 and FRA2 from each other. When the total number of thebypass wiring portions is even, the bypass wiring portions in the frameregions FRA1 and FRA2 can be arranged so that the numbers of them areequal to each other as similar to the display apparatus DSP1. However,when the total number of the bypass wiring portions is odd, the numberof the bypass wiring portions in either one of the frame regions FRA1and FRA2 may be one larger than the other.

Each of the plurality of bypass wiring portions SLc2 (see FIG. 6) andthe plurality of bypass wiring portions SLc3 (see FIG. 7) that arearranged in the region FRA1 shown in FIG. 8 extends in an arc form alongthe outer edge of the transparent region TRA. A planar shape of theregion FRA1 is a crescent moon shape. A width FRw1 of the region FRA1changes depending on a position in the Y direction, and is the largestat a position overlapping a first virtual line VL1 that extends in the Xdirection from the center of the transparent region TRA. Similarly, eachof the plurality of bypass wiring portions SLc2 and the plurality ofbypass wiring portions SLc3 that are arranged in the region FRA2 extendsin an arc form along the outer edge of the transparent region TRA. Aplanar shape of the region FRA2 is a crescent moon shape. A width FRw2of the region FRA2 changes depending on a position in the Y direction,and is the largest at a position overlapping the first virtual line VL1that extends in the X direction from the center of the transparentregion TRA. Note that the width of each of the regions FRA1 and FRA2 isdefined to be a length in a direction that is orthogonal to a tangentline to the bypass wiring portion that is arranged in the innermostcircumference of each region. The farther a position from the virtualline VL1 is, the smaller the width FRw1 or FRw2 is.

As shown in FIG. 5, in the case of the display apparatus DSP1, theplurality of scan signal lines GL also have bypass wiring portions GLc.Some of the plurality of scan signal lines GL include a plurality ofextension wiring portions (scan-signal extension wiring portions) GLrthat are arranged in the display region DA so as to extend in the Xdirection and a plurality of bypass wiring portions GLc that arearranged in the frame region FRA of the conductive layer CL1 so as tohave both ends being connected to the plurality of extension wiringportions GLr.

As described above, the number of the scan signal lines GL correspondingto one pixel PX (see FIG. 3) is smaller than the number of the imagesignal lines SL. Therefore, when a shape of the frame region FRA iscircular, an arrangement pitch GLp2 between the plurality of bypasswiring portions GLc has a margin in comparison with the arrangementpitch SLp2 between the plurality of bypass wiring portions SLc2 shown inFIG. 6. However, when the plurality of bypass wiring portions GLc arearranged in the frame region FRA, it is preferable to decrease thearrangement pitch GLp2. In the case shown in FIG. 5, the arrangementpitch GLp2 between the bypass wiring portions GLc is smaller than thearrangement pitch GLp1 between the plurality of scan signal lines GL inthe display region DA. In the case shown in FIG. 5, the arrangementpitch GLp1 between the scan signal lines GL in the Y direction is 54 μm.On the other hand, the arrangement pitch GLp2 between the bypass wiringportions GLc of the scan signal lines GL in the Y direction is 9 μm. Inthis case, the width of the frame region FRA in the Y direction can bedecreased, and therefore, the area of the frame region FRA can beresultantly decreased.

FIG. 9 is an enlarged planar view schematically showing a region wherethe plurality of bypass wiring portions shown in FIG. 5 are arranged. Inthe display apparatus DSP1, as shown in FIG. 5, the plurality of bypasswiring portions GLc are arranged on both sides of the transparent regionTRA in the Y direction. In other words, as shown in FIG. 9, the frameregion FRA includes a region (third region) FPA3 which is arrangedadjacent to the transparent region TRA in the Y direction and where onepart of each of the plurality of bypass wiring portions GLc (see FIG. 5)is arranged. Also, the frame region FRA includes a region (fourthregion) FRA4 which is opposite to the region FRA3 across the transparentregion TRA and where the other part of each of the plurality of bypasswiring portions GLc is arranged.

In the case of the display apparatus DSP1, the number of the bypasswiring portions GLc (see FIG. 5) that are arranged in the region FRA3shown in FIG. 9 and the number of the bypass wiring portions GLc thatare arranged in the region FRA4 are equal to each other. In other words,the bypass wiring portions GLc are arranged to be well balanced on theboth sides of the transparent region TRA in the Y direction so that thenumbers of them are equal to each other. For example, in the exampleshown in FIG. 5, each of the number of the bypass wiring portions GLcthat are arranged in the region FRA3 (see FIG. 9) and the number of thebypass wiring portions GLc that are arranged in the region FRA4 (seeFIG. 9) is 9. Note that the example of FIG. 5 shows the case with thesmall number of the scan signal lines GL in consideration of easiness ofview of the drawings. Therefore, it is needless to say that there is notonly the example of FIG. 5 but also various modification examples forthe total number of the bypass wiring portions GLc. For example, when 40to 150 scan signal lines GL are arranged in total in the frame regionFRA as described above, there is a case with 20 to 75 bypass wiringportions as each of the number of the bypass wiring portions GLc thatare arranged in the frame region FRA3 and the number of the bypasswiring portions GLc that are arranged in the frame region FRA4. When thetotal number of the bypass wiring portions GLc is odd, the number of thebypass wiring portions in either one of the frame regions FRA3 and FRA4may be one larger than the other.

Each of the plurality of bypass wiring portions GLc (see FIG. 5) thatare arranged in the region FRA3 shown in FIG. 9 extends in an arc formalong the outer edge of the transparent region TRA. A planar shape ofthe region FRA3 is a crescent moon shape. A width FRw3 of the regionFRA3 changes depending on a position in the X direction, and is thelargest at a position overlapping a second virtual line VL2 that extendsin the Y direction from the center of the transparent region TRA.Similarly, each of the plurality of bypass wiring portions GLc that arearranged in the region FRA4 extends in an arc form along the outer edgeof the transparent region TRA. A planar shape of the region FRA4 is acrescent moon shape. A width FRw4 of the region FRA4 changes dependingon a position in the X direction, and is the largest at a positionoverlapping the second virtual line VL2 that extends in the Y directionfrom the center of the transparent region TRA. Note that the width ofeach of the regions FRA3 and FRA4 is defined to be a length in adirection that is orthogonal to a tangent line to the bypass wiringportion that is arranged in the innermost circumference of each region.The farther a position from the virtual line VL2 is, the smaller thewidth FRw3 or FRw4 is.

As described with reference to FIG. 6, the plurality of image signallines SL include the plurality of image signal lines SLR in which theimage signal for the first color (such as red) is transmitted, theplurality of image signal lines SLB in which the image signal for thesecond color (such as blue) is transmitted, and the plurality of imagesignal lines SLG in which the image signal for the third color (such asgreen) is transmitted. In the case of the display apparatus DSP1, theplurality of image signal lines SLR and the plurality of image signallines SLB shown in FIG. 6 are connected to the plurality of bypasswiring portions SLc2 in the frame region FRA, and the plurality of imagesignal lines SLG are connected to the plurality of bypass wiringportions SLc3 in the frame region FRA shown in FIG. 7. In a case ofconnection of some of the plurality of image signal lines SL to thebypass wiring portion SLc3 of the conductive layer CL3 shown in FIG. 7as seen in the display apparatus DSP1, types of the image signal linesSL that are connected to the bypass wiring portions SLc3 are preferablythe same type of the image signal lines SL among the plurality of typesof the image signal lines SL. The bypass wiring portions SLc2 and thebypass wiring portions SLc3 are different from each other in values of awiring resistance, a capacitance load and others. Therefore, in a caseof connection of the image signal line SL for a specific color to thebypass wiring portion SLc3, at the time of the display in the rastermode that displays the image by setting a color density for each pixel,unevenness due to the connection of some of the image signal lines SL tothe bypass wiring portion SLc3 can be reduced. For example, in a case ofconnection of only the image signal line SL for a specific color to thebypass wiring portion SLc3, a signal intensity of the image signal thatis supplied to the bypass wiring portion SLc3 can be adjusted.

FIG. 10 is an enlarged planar view showing an overlap state of thebypass wirings shown in FIGS. 6 and 7 at a “B” portion shown in FIG. 7.FIG. 11 is an enlarged planar view showing an overlap state of thebypass wirings shown in FIGS. 5 and 6 at the same portion as that ofFIG. 10. FIG. 12 is an enlarged cross-sectional view taken along a lineA-A shown in FIGS. 10 and 11. FIGS. 10 and 11 are planar views but areadded with a dot pattern or a hatching in order to easily see aplanar-view positional relation among the bypass wiring portions thatare arranged in the respective conductive layers. More specifically, thewiring that is formed in the conductive layer CL2 shown in FIG. 12 isadded with the dot pattern, and the wirings that are formed in theconductive layer CL1 and the conductive layer CL3 are added with thehatching. In a region where the bypass wiring portion SLc2 and thebypass wiring portion SLc3 overlap each other, an outline of the bypasswiring portion SLc2 is illustrated with a dot line.

As shown in FIG. 10, a pair of the image signal line SLR and the imagesignal line SLB are arranged so as to be adjacent to each other in theframe region FRA, and the image signal line SLG is arranged between thepair of the image signal line SLR and the image signal line SLB in aplanar view. In a planar view, the arrangement pitch SLp3 between theplurality of bypass wiring portions SLc3 that are adjacent to each otheris larger than the arrangement pitch SLp2 between the plurality ofbypass wiring portions SLc2 that are adjacent to each other. Forexample, the arrangement pitch SLp3 between the plurality of bypasswiring portions SLc3 is 9 μm, and the arrangement pitch SLp2 between thebypass wiring portions SLc2 in the frame region FRA is 4.5 μm.

As shown in FIG. 10, since the bypass wiring portion SLc3 is arrangedbetween the adjacent bypass wiring portions SLc2 in a planar view,variation in the capacitance load on each of the plurality of bypasswiring portions SLc2 can be reduced. By the above-described layout,variation in the capacitance load on each of the plurality of bypasswiring portions SLc3 can be reduced.

As shown in FIG. 11, a pair of the image signal line SLR and the imagesignal line SLB are arranged so as to be adjacent to each other in theframe region FRA, and the scan signal line GL is arranged between thepair of the image signal line SLR and the image signal line SLB in aplanar view. In a planar view, the arrangement pitch GLp2 between theplurality of bypass wiring portions GLc that are adjacent to each otheris larger than the arrangement pitch SLp2 between the plurality ofbypass wiring portions SLc2 that are adjacent to each other.

As shown in FIG. 11, since the bypass wiring portion GLc is arrangedbetween the bypass wiring portions SLc2 that are adjacent to each otherin a planar view, variation in the capacitance load on each of theplurality of bypass wiring portions SLc2 can be reduced. By theabove-described layout, variation in the capacitance load on each of theplurality of bypass wiring portions GLc can be reduced.

As shown in FIG. 12, in a planar view, the plurality of bypass wiringportions GLc of the scan signal line GL and the plurality of bypasswiring portions SLc3 of the image signal line SLG overlap each other.While FIG. 12 is the cross-sectional view, it is obvious that theplurality of bypass wiring portions GLc and the plurality of bypasswiring portions SLc3 overlap each other in a planar view when the A-Alines shown in FIGS. 10 and 11 overlap each other. As shown in FIG. 10or 11, in a gap between the pairs that are adjacent to each other in aplanar view, the plurality of bypass wiring portions GLc of the scansignal line GL and the plurality of bypass wiring portions SLc3 of theimage signal line SLG are not arranged. Therefore, as shown in FIGS. 10and 11, the gap between the pairs that are adjacent to each other (forexample, a gap between the adjacent bypass wiring portions SLc3 or a gapbetween the adjacent scan signal lines GL) has a light-transmittableregion TLA that extends in an extension direction of the plurality ofbypass wiring portions SLc2.

As shown in FIG. 12, in the frame region FRA, the light-blockingmetallic wirings (the conductive layer CL1, the conductive layer CL2 andthe conductive layer CL3) are densely arranged. As described later withreference to FIG. 16, in the frame region FRA, the sealing member SLM isoften arranged so as to overlap the light-blocking metallic wirings. Inthis case, the sealing member SLM contains an ultraviolet-ray curableresin. When ultraviolet ray is emitted to the sealing member SLM, thesealing member SLM is hardened, so that the substrate 10 and thesubstrate 20 are adhered to each other. By the hardening of the sealingmember SLM that is between the substrate 10 and the substrate 20, theliquid crystals can be prevented from entering from the display regionDA to the transparent region TRA. In this case, the transparency of thetransparent region TRA can be prevented from being inhibited by theliquid crystals. In the hardening of the sealing member SLM that is theultraviolet-ray curable resin in the frame region FRA, it is necessaryto emit the ultraviolet ray to the sealing member SLM. While thelight-blocking metallic wirings are densely arranged in the frame regionFRA, the light-transmittable region TLA is arranged in the frame regionFRA as shown in FIGS. 10 and 11. Therefore, the ultraviolet raypenetrates the region TLA, and is emitted to the sealing member SLM, andthus, can harden the sealing member SLM. As shown in FIGS. 10 and 11,since the plurality of regions TLA are continuously arranged, theultraviolet ray is easy to be emitted to the sealing member SLM.

The configurations shown in FIGS. 10 to 12 can be expressed as follows.As shown in FIG. 12, the plurality of image signal lines SL include theplurality of image signal lines SLR in which the image signal for thefirst color (such as red) is transmitted, the plurality of image signallines SLB in which the image signal for the second color (such as blue)is transmitted, and the plurality of image signal lines SLG in which theimage signal for the third color (such as green) is transmitted. Asshown in FIG. 11, in a planar view, one of the image signal lines SLRand one of the image signal lines SLB are arranged between the adjacentbypass wiring portions GLc. As shown in FIG. 12, the plurality of bypasswiring portions SLc3 overlap the plurality of bypass wiring portionsGLc, and are connected to the plurality of image signal lines SLG.

Note that the above is the explanation of the example of the hardeningof the sealing member SLM shown in FIG. 16 by the ultraviolet ray.However, the insulating film 14 or the insulating film 15 shown in FIG.12 may contain the ultraviolet-ray curable resin. The frame region FRAoverlaps the light-blocking film BM shown in FIG. 4 in some cases. Whenthere are the plurality of regions TLA as shown in FIGS. 10 and 11, theemission of the ultraviolet ray in a direction from the substrate 10 canreach the sealing member SLM shown in FIG. 16. Therefore, in a regioncloser to the substrate 20, it may be acceptable that the entire frameregion FRA overlaps the light-blocking film BM shown in FIG. 4.

Next, a structure of connection between the extension wiring portion SLrof the image signal line SL shown in FIG. 6 and the bypass wiringportion SLc3 shown in FIG. 7 will be explained. FIG. 13 is an enlargedplanar view in periphery of a portion that connects the secondconductive layer shown in FIG. 6 and the third conductive layer shown inFIG. 7. FIG. 14 is an enlarged planar view of an “A” portion of FIG. 13.FIG. 15 is an enlarged cross-sectional view taken along a line A-A lineof FIG. 14. While FIGS. 13 and 14 are planar views, the wirings formedin the conductive layer CL2 shown in FIG. 15 are added with the dotpattern, and the wirings that are formed in the conductive layer CL3 areadded with the hatching. In FIGS. 13 and 14, each of an outline of thescan signal line GL formed in the conductive layer CL1 shown in FIG. 15and an outline of the base surface CHb of the contact hole CH1 isillustrated with a dashed double-dotted line. In FIG. 13, a contactregion CTA where the plurality of contact holes CH1 are arranged isadded with a hatching. In FIG. 14, in a region where the bypass wiringportion SLc2 and the bypass wiring portion SLc3 overlap each other, anoutline of the bypass wiring portion SLc2 is illustrated with a dottedline. The bypass wiring portion GLc is illustrated with a dasheddouble-dotted line.

As shown in FIGS. 13 to 15, in the frame region FRA, the contact holeCH1 that electrically connects the conductive layer CL2 (see FIG. 15)and the conductive layer CL3 (see FIG. 15) is formed. As shown in FIG.15, the contact hole CH1 is an opening that is formed to hole theinsulating film 14. At the base surface CHb of the contact hole CH1, apart of the extension wiring portion SLr of the image signal line SL isexposed from the insulating film 14. A metallic pattern is formed at theexposed portion of the extension wiring portion SLr from the insulatingfilm 14, and this metallic pattern extends toward the bypass wiringportion SLc3 that is formed in the conductive layer CL3. The extensionwiring portion SLr that is formed in the conductive layer CL2 and thebypass wiring portion SLc3 that is formed in the conductive layer CL3are electrically connected to each other through the contact hole CH1.As shown in FIG. 13, the frame region FPA includes the contact regionCTA where the plurality of contact holes CH1 that electrically connectthe conductive layer CL2 and the conductive layer CL3 are arranged alongthe X direction.

As shown in FIG. 14, a contact SLCP having a larger width (length in theY direction) than that of the extension wiring portion SLr is connectedto an end of the extension wiring portion SLr of the image signal lineSLG. In the contact SLCP, the base surface CHb of the contact hole CH1is arranged. In order to improve reliability of the connection betweenthe conductive layer CL2 (see FIG. 15) and the conductive layer CL3 (seeFIG. 15), it is preferable to increase an area of the base surface CHbof the contact hole CH1. Therefore, the contact SLCP has the largerwidth than that of the extension wiring portion SLr. Meanwhile, aportion having the conductor pattern with a large area formed in theconductive layer CL2 has a large capacitance load due to this conductorpattern. Therefore, as shown in FIG. 14, in a planar view, each basesurface CHb of the plurality of contact holes CH1 is preferably formedat a position not overlapping the plurality of scan signal lines GL. Inthis manner, the mutual capacitance load between the contact SLCP andthe plurality of scan signal lines GL can be reduced.

In order to reduce the mutual capacitance load between the contact SLCPand the plurality of scan signal lines GL, it is particularly preferableto avoid the overlapping of the entire contact SLCP of the image signalline SLG with the scan signal line GL. However, the contact SLCP isformed in the frame region where the bypass wiring portions GLc of thescan signal lines GL are densely arranged. Therefore, it is difficult toarrange the entire contact SLCP of the image signal line SLG so as notto overlap the scan signal line GL in some cases. Even in such a case,at least when the respective base surfaces CHb of the plurality ofcontact holes CH1 are formed at the position not overlapping theplurality of scan signal lines GL, the mutual capacitance load betweenthe contact SLCP and the plurality of scan signal lines GL can bereduced.

In the case shown in FIG. 14, a separate distance GLs1 between thebypass wiring portions GLc of the adjacent scan signal lines GL islarger than a separate distance SLs1 between the bypass wiring portionsSLc2 of the adjacent image signal lines SL. When the separate distanceGLs1 between the bypass wiring portions GLc of the adjacent scan signallines GL is large as described above, it is easy to achieve the layoutof the respective base surfaces CHb of the plurality of contact holesCH1 at the positions not overlapping the plurality of scan signal linesGL. As explained with reference to FIGS. 5 and 6, the number of the scansignal lines GL that are arranged in the frame region FRA is smallerthan the number of the image signal lines SL that are arranged in theframe region FRA. Therefore, when the shape of the frame region iscircular, the arrangement pitch between the bypass wiring portions SLc2of the image signal lines SL is dominant as the factor for defining thearea of the frame region FRA, and thus, the increase in the area of theframe region FRA can be suppressed even if the separate distance GLs1between the bypass wiring portions GLc is large.

FIG. 16 is an enlarged planar view showing a planar shape of a sealingmember that is arranged in the frame region in the periphery of thetransparent region TRA shown in FIG. 1. FIG. 17 is an enlargedcross-sectional view taken along a line A-A of FIG. 16. As shown in FIG.16, the display apparatus DSP1 includes a sealing member SLM that isarranged in the frame region FRA so as to surround the transparentregion TRA in a planar view and that fixedly bonds the substrate 10 (seeFIG. 17) and the substrate 20 (see FIG. 17). This sealing member SLM ismade of the same material as that of the sealing member SLM that isarranged in the peripheral region PFA shown in FIGS. 1 and 2, and has afunction of suppressing leakage of the liquid crystal layer LQ (see FIG.17) to outside of the display region DA. In the example shown in FIG.17, the substrate 10 and the substrate 20 exist in the transparentregion TRA. However, an opening that holes the substrate 10 (or thesubstrate 10 and the substrate 20) may be formed in the transparentregion TRA when the sealing member SLM is arranged on the entirecircumference of the frame region FRA. The hardening of the sealingmember SLM by the ultraviolet ray is as described above.

In the case of the arrangement of the sealing member SLM in the frameregion FRA as shown in FIG. 16, application of the sealing member SLMstarts from an optional point (start point) of the frame region FRA. Anapplication process of the sealing member SLM is continuously performedso as to draw a circle along the outer circumference of the transparentregion TRA, and the process ends when the process returns to theapplication start point of the sealing member SLM. In the case of theabove-described application method of the sealing member SLM, at aposition at which the start point and the end point of the applicationprocess overlap each other, an application amount of the sealing memberSLM is large. As a result, a width WSL1 of the sealing member SLM at thestart point of the application process is larger than a width WSL2 ofthe sealing member SLM at a point that is different from the start pointand the end point. If the sealing member SLM leaks to the display regionDA, this leakage becomes a cause of failure in the display. If thesealing member SLM leaks to the transparent region TRA, this leakagebecomes a cause of failure in the light transmittable property.Therefore, even at the start point of the application process of thesealing member SLM, it is necessary to prevent the leakage of thesealing member SLM from the frame region FRA.

In the case of the display apparatus DSP1, as shown in FIG. 4, theconductive layer CL2 is covered with the insulating film 14, and theconductive layer CL3 is formed on the insulating layer 14 and coveredwith the insulating film 15. As shown in FIG. 13, the 42) frame regionFRA includes the contact region CTA where the plurality of contact holesCH1 that electrically connect the conductive layer CL2 (see FIG. 15) andthe conductive layer CL3 (see FIG. 15) are arranged along the Xdirection. And, as shown in FIG. 17, a gap between the contact regionCTA and the display region DA has a step portion STP1 not having theconductive layer CL3 (see FIG. 15) and the insulating film 15 formed onthe insulating film 14. The step portion STP1 has a concave shape thatis formed by removing the insulating film 15. When the applicationamount of the sealing member SLM is locally large, the sealing memberSLM flows into the step portion STP1 in some cases. However, in the stepportion STP1, the separate distance between the alignment film AL1 andthe alignment film AL2 is larger than that of the display region DA.Therefore, even when the sealing member SLM spreads into the stepportion STP1, an end of the sealing member does not reach the displayregion DA. That is, by the formation of the step portion STP1, thesealing member SLM can be suppressed from leaking to the display regionDA or the transparent region TRA.

The step portion STP1 is formed by removing a part of the insulatingfilm 15. In the case of the display apparatus DSP1, the conductorpattern of the conductive layer CL3 is formed inside the frame regionFRA as shown in FIG. 15, and therefore, it is necessary to form theinsulating film 15 inside the frame region FRA. However, when theposition of the contact region CTA is closer to the transparent regionTRA as shown in FIG. 17, the step portion STP1 can be formed.

As shown in FIG. 13, in the frame region FRA, the plurality of imagesignal lines SL and the plurality of scan signal lines GL cross eachother. In the step of forming the conductive layer CL1 and theconductive layer CL2 shown in FIG. 15, the conductive layer CL1 and theinsulating film 13 are formed before the formation of the conductivelayer CL2. Since the insulating film 13 is thinner than the insulatingfilm 14 that is the inorganic insulating film, surface flatness of theinsulating film 13 is lower than surface flatness of the insulating film14. Therefore, a wiring width of the image signal line SL tends to besmall at each cross point at which the plurality of image signal linesSL and the bypass wiring portions GLc of the plurality of scan signallines GL cross each other.

Accordingly, in the case of the display apparatus DSP1, a countermeasurehas been made for suppressing reduction in a signal transmissionproperty resulted from the thin image signal line SL at the cross pointwith the scan signal line GL. That is, a width SLw1 of the extensionwiring portion SLr of each of the plurality of image signal lines SLshown in FIG. 6 is larger than a width SLw2 of each of the plurality ofbypass wiring portions SLc2. As described above, in order to reduce thearea of the frame region FRA, the arrangement pitch SLp2 between thebypass wiring portions SLc2 is preferably as small as possible. By thesmall width SLw2 of the bypass wiring portions SLc2, the arrangementpitch SLp2 can be made small. In the example shown in FIG. 6, the widthSLw2 of the bypass wiring portions SLc2 is 2.1 μm, and the arrangementpitch SLp2 is 4.5 μm. Meanwhile, the width SLw1 of the extension wiringportion SLr of each of the plurality of image signal lines SL is 2.7 μm.This manner can suppress the reduction in the signal transmissionproperty resulted from the thin image signal line SL at the cross pointwith the scan signal line GL.

Note that the width SLw3 of the bypass wiring portion SLc3 shown in FIG.7 is 3.5 μm. The conductor pattern that is formed in the conductivelayer CL3 (see FIG. 15) is made of a metal having a larger resistancethan that of the conductor pattern that is formed in the conductivelayer CL2 (see FIG. 15). Therefore, when the width SLw3 of the bypasswiring portion SLc3 in the conductive layer CL3 is made larger than thewidth SLw2 shown in FIG. 6, a difference in a wiring impedance betweenthe bypass wiring portion SLc3 and the bypass wiring portion SLc2 can bereduced. The width GLw2 of the bypass wiring portion GLc of the scansignal line GL shown in FIG. 5 is equal to the width GLw1 of the scansignal line GL in the display region DA. For example, in the exampleshown in FIG. 5, each of the width GLw1 and the width GLw2 is 3 μm.

As shown in FIG. 13, in order to decrease the capacitance load due tothe crossing at the cross points at which the plurality of image signallines SL and the bypass wiring portion GLc of the plurality of scansignal lines GL cross each other, an overlap area of the image signalline SL and the scan signal line GL is better to be small. In order todecrease the overlap area of the image signal line SL and the scansignal line GL, an angle of the crossing of the image signal line SL andthe scan signal line GL is preferably a right angle as close aspossible. In the case of the present embodiment, as shown in FIG. 13,regarding an acute angle that is formed at each of the plurality ofcross points at which the plurality of image signal lines SL and theplurality of bypass wiring portions GLc cross each other in the frameregion FRA, the number of acute angles θ1 that is equal to or largerthan 45 degrees is larger than the number of acute angles that issmaller than 45 degrees. In the example shown in FIG. 13, note that theacute angles that are formed at the cross points at which the imagesignal lines SL and the bypass wiring portions GLc GL cross each otherdo not include the acute angle that is smaller than 45 degrees. Theexpression describing that “the number of acute angles θ1 that is equalto or larger than 45 degrees is larger than the number of acute anglesthat is smaller than 45 degrees” also includes a case without the acuteangle that is smaller than 45 degrees. It is needless to say that theabove-described expression also includes a case with the acute anglethat is smaller than 45 degrees.

Second Embodiment

In the above-described first embodiment, the aspect of the decrease inthe area of the frame region FRA shown in FIG. 6 by the formation of thebypass wiring portions of the image signal lines SL in the plurality ofconductive layers has been explained. In the present second embodiment,an aspect in a case of routing the bypass wiring portion of the imagesignal line SL in single conductive layer will be explained. FIG. 18 isan enlarged planar view of a second conductive layer in periphery of atransparent region of a display apparatus according to a modificationexample of FIG. 6.

A display apparatus DSP2 shown in FIG. 18 is different from the displayapparatus DSP1 shown in FIG. 6 in that all bypass wiring portions SLc2of the image signal lines SL are arranged in the conductive layer CL2that is the second conductive layer while any wiring is not formed inthe conductive layer CL3 shown in FIG. 7. The arrangement pitch SLp1between the image signal lines SL in the display region DA is 18 μm assimilar to the example shown in FIG. 6. The arrangement pitch SLp2between the bypass wiring portions SLc2 in the frame region FRA is 4.5μm as similar to the example shown in FIG. 6. In the case of the displayapparatus DSP2, the arrangement pitch SLp2 between the bypass wiringportions SLc2 is smaller than the arrangement pitch SLp1 between theimage signal lines SL in the display region DA, and therefore, the areaof the frame region FRA can be decreased.

FIG. 19 is an enlarged planar view schematically showing a region wherea plurality of bypass wiring portions shown in FIG. 18 are arranged. Asshown in FIG. 19, in the case of the display apparatus DSP2, theplurality of bypass wiring portions SLc2 are arranged on both sides ofthe transparent region TRA in the X direction. In other words, as shownin FIG. 19, the frame region FRA includes a region (first region) FRA1which is arranged adjacent to the transparent region TRA in the Xdirection and where one part of each of the plurality of bypass wiringportions SLc2 (see FIG. 18) is arranged. Also, the frame region FRAincludes a region (second region) FRA2 which is opposite to the regionFRA1 across the transparent region TRA and where the other part of eachof the plurality of bypass wiring portions SLc2 is arranged.

As shown in FIG. 19, when the bypass wiring portions SLc2 (see FIG. 18)are arranged on both sides of the transparent region TRA in the Xdirection, the area of the frame region FRA can be made smaller thanthat in the case of the arrangement of the bypass wiring portion on onlyeither one side of the transparent region TRA in the X direction.

Each of the plurality of bypass wiring portions SLc2 (see FIG. 18) thatare arranged in the region FRA1 shown in FIG. 19 extends in an arc formalong the outer edge of the transparent region TRA. A planar shape ofthe region FRA1 is a crescent moon shape. A width FRw1 of the regionFRA1 changes depending on a position in the Y direction, and is thelargest at a position overlapping a first virtual line VL1 that extendsin the X direction from a center of the transparent region TRA.Similarly, each of the plurality of bypass wiring portions SLc2 that arearranged in the region FRA2 extends in an arc form along the outer edgeof the transparent region TRA. A planar shape of the region FRA2 is acrescent moon shape. A width FRw2 of the region FRA2 changes dependingon a position in the Y direction, and is the largest at a positionoverlapping the first virtual line VL1 that extends in the X directionfrom the center of the transparent region TRA. Note that the width ofeach of the regions FRA1 and FRA2 is defined to be a length in adirection that is orthogonal to a tangent line to the bypass wiringportion that is arranged in the innermost circumference of each region.The farther a position from the virtual line VL1 is, the smaller thewidth FRw1 or FRw2 is.

FIG. 20 is an enlarged planar view schematically showing a region wherea plurality of bypass wiring portions of the first conductive layer ofthe display apparatus DSP2 shown in FIG. 18 are arranged. As similar tothe display apparatus DSP1 shown in FIG. 9, the frame region FRA of thedisplay apparatus DSP2 shown in FIG. 20 includes a region (third region)FRA3 which is arranged adjacent to the transparent region TRA in the Ydirection and where one part of each of the plurality of bypass wiringportions GLc (see FIG. 5) is arranged. Also, the frame region FRAincludes a region (fourth region) FRA4 which is opposite to the regionFRA3 across the transparent region TRA and where the other part of eachof the plurality of bypass wiring portions GLc is arranged.

As shown in FIG. 19, each outer edge of the region FRA1 and the regionFRA2 (each circumferential portion thereof closer to the display regionDA) of the frame region FRA in a planar view is arranged along a firstellipse ELP1 having two focal points in the X direction. As shown inFIG. 20, each outer edge of the region FRA3 and the region FRA4 (eachcircumferential portion thereof closer to the display region DA) of theframe region FRA in a planar view is arranged along a second ellipseELP2 having two focal points in the Y direction.

As shown in FIGS. 19 and 20, the transparent region TRA in a planar viewis circular. Each inner edge of the region FRA1 and the region FRA2(each circumferential portion thereof closer to the transparent regionTRA) of the frame region FRA in a planar view shown in FIG. 19 isarranged along a circle that is a concentric circle with the center ofthe transparent region TRA. As shown in FIG. 20, each inner edge of theregion FRA3 and the region FRA4 (each circumferential portion thereofcloser to the transparent region TRA) of the frame region FRA in aplanar view is arranged along a circle that is a concentric circle withthe center of the transparent region TRA.

FIG. 21 is an enlarged cross-sectional view showing a modificationexample of FIG. 12. In the case of the display apparatus DSP2, thebypass wiring portion is not arranged in the conductive layer CL3 asdescried above. Therefore, the display apparatus DSP2 is different fromthe display apparatus DSP1 that has been explained with reference toFIG. 12 in the layout of the image signal lines SL. That is, as shown inFIG. 21, the plurality of image signal lines SL include the plurality ofimage signal lines SLR in which the image signal for the first color(such as red) is transmitted, the plurality of image signal lines SLB inwhich the image signal for the second color (such as blue) istransmitted, and the plurality of image signal lines SLG in which theimage signal for the third color (such as green) is transmitted. In aplanar view, one of the image signal lines SLR, one of the image signallines SLG and one of the image signal lines SLB are arranged between theadjacent bypass wiring portions GLc.

An order of the arrangement of the image signal line SLR, the imagesignal line SLG and the image signal line SLB is preferably periodic.That is, in the example shown in FIG. 21, the bypass wiring portion SLc2of the image signal line SLR is arranged between the image signal lineSLG and one of the bypass wiring portions GLc, and the bypass wiringportion SLc2 of the image signal line SLB is arranged between the imagesignal line SLG and the other of the bypass wiring portions GLc. In thiscase, the capacitance loads on the respective wirings of the imagesignal line SLR, the image signal line SLG and the image signal line SLBcan be unified. As a result, in the display in the raster mode thatdisplays the image by setting the color density for each pixel, thedisplay unevenness due to the difference of the capacitance load on theimage signal line SL can be reduced.

The display apparatus DSP2 is the same as the display apparatus DSP1shown in FIG. 1 except in the above-described differences. Therefore,the repetitive explanation will be omitted. However, a part of theplurality of technical features of the display apparatus DSP1 that hasbeen explained with reference to FIGS. 1 to 17 may be applicable to thedisplay apparatus DSP2.

It would be understood that various modification examples and alterationexamples could have been anticipated within the concept of the presentinvention by those who are skilled in the art, and understood that thesemodification examples and alteration examples are also within the scopeof the present invention. For example, the ones obtained by appropriateaddition, removal, or design-change of the components to/from/into eachof the above-described embodiments by those who are skilled in the artor obtained by addition, omitting, or condition-change of the stepto/from/into each of the above-described embodiments are also within thescope of the present invention as long as they include the outline ofthe present invention.

The explanations for the above-described embodiments include thefollowing technical concepts.

[Statement 1]

A display apparatus includes:

a first substrate having a display region, a transparent region formedinside the display region in a planar view, and a frame region formedbetween the display region and the transparent region so as to surroundthe transparent region along an outer edge of the transparent region ina planar view;

a plurality of scan signal lines formed in a first conductive layer onthe first substrate in the display region so as to extend in a firstdirection; and

a plurality of image signal lines formed in a second conductive layer onthe first substrate in the display region so as to extend in a seconddirection crossing the first direction,

some of the plurality of scan signal lines include: a plurality of firstextension wirings arranged in the display region so as to extend in thefirst direction and a plurality of first bypass wirings arranged in theframe region so as to have both ends being connected to the plurality offirst extension wirings,

some of the plurality of image signal lines include: a plurality ofsecond extension wirings arranged in the display region so as to extendin the second direction and a plurality of second bypass wiringsarranged in the frame region so as to have both ends being connected tothe plurality of second extension wirings,

an arrangement pitch between the plurality of first bypass wirings issmaller than an arrangement pitch between the plurality of firstextension wirings,

an arrangement pitch between the plurality of second bypass wirings issmaller than an arrangement pitch between the plurality of secondextension wirings,

the frame region includes:

a first region arranged adjacent to the transparent region in the firstdirection and where one part of each of the plurality of second bypasswirings is arranged;

a second region which is opposite to the first region across thetransparent region in the first direction and where the other part ofeach of the plurality of second bypass wirings is arranged;

a third region arranged adjacent to the transparent region in the seconddirection and where one part of each of the plurality of first bypasswirings is arranged; and

a fourth region which is opposite to the third region across thetransparent region in the second direction and where the other part ofeach of the plurality of first bypass wirings is arranged.

[Statement 2]

In the display apparatus of the Statement 1,

each outer edge of the first region and the second region (eachcircumferential portion thereof closer to the display region) of theframe region in a planar view is arranged along a first ellipse havingtwo focal points in the first direction, and

each outer edge of the third region and the fourth region (eachcircumferential portion thereof closer to the display region) of theframe region in a planar view is arranged along a second ellipse havingtwo focal points in the second direction.

[Statement 3]

In the display apparatus of the Statement 2,

the transparent region in a planar view is circular,

each inner edge of the first region and the second region (eachcircumferential portion thereof closer to the transparent region) of theframe region in a planar view is arranged along a first circle that is aconcentric circle with a center of the transparent region, and

each inner edge of the third region and the fourth region (eachcircumferential portion thereof closer to the transparent region) of theframe region in a planar view is arranged along a second circle that isa concentric circle with the center of the transparent region.

[Statement 4]

In the display apparatus of the Statement 1,

the plurality of image signal lines include a plurality of first imagesignal lines in which an image signal for a first color is transmitted,a plurality of second image signal lines in which an image signal for asecond color is transmitted, and a plurality of third image signal linesin which an image signal for a third color is transmitted, and

one of the first image signal lines, one of the second image signallines and one of the third image signal lines are arranged between thefirst bypass wirings that are adjacent to each other in a planar view.

INDUSTRIAL APPLICABILITY

The present invention can be utilized for a display apparatus.

EXPLANATION OF REFERENCE CHARACTERS

-   -   10, 20 . . . substrate    -   10 f, 20 f . . . front surface (plane, main surface)    -   20 b . . . back surface (plane, main surface)    -   11 to 16 . . . insulating film    -   AL1, AL2 . . . alignment film    -   CH1 . . . contact hole    -   CHb . . . base surface    -   CL1, CL2, CL3, CL4, CL5 . . . conductive layer    -   CTA . . . contact region    -   DA . . . display region    -   DSP1, DSP2 . . . display apparatus    -   FRA . . . frame region    -   GL . . . scan signal line    -   GLc, SLc2, SLc3 . . . bypass wiring portion (bypass wiring)    -   GLr, SLr . . . extension wiring portion (extension wiring)    -   GLs1, SLs1 . . . separate distance    -   GLp1, GLp2, SLp1, SLp2, SLp3 . . . arrangement pitch    -   GLw1, GLw2, SLw1, SLw2, SLw3 . . . width    -   LQ . . . liquid crystal layer    -   SL, SLB, SLG, SLR . . . image signal line    -   SLCP . . . contact    -   SLM . . . sealing member (adhesive member)    -   STP1 . . . step portion    -   TRA . . . transparent region

1. A display apparatus comprising: a first substrate having a displayregion; a transparent region formed inside the display region in aplanar view; a frame region formed between the display region and thetransparent region so as to surround the transparent region along anouter edge of the transparent region in a planar view; a plurality ofscan signal lines formed in a first conductive layer on the firstsubstrate in the display region; and a plurality of image signal linesformed in a second conductive layer on the first substrate in thedisplay region, wherein the plurality of image signal lines is arrayedin a first direction in the display region, the plurality of scan signallines is arrayed in a second direction crossing the first direction, theplurality of image signal lines include a first image signal line and asecond image signal line, the first image signal line has a firstextension portion and a first bypass portion connected to the firstextension portion, the second image signal line has a second extensionportion and a second bypass portion connected to the second extensionportion, each of the first extension portion and the second extensionportion extends from the display area to the frame region, each of thefirst bypass portion and the second bypass portion extends along theedge of the outer edge of the transparent region in the frame region,each of the first extension portion, the second extension portion, andthe first bypass portion is formed in the second conductive layer, andthe second bypass portion is formed in a conductive layer that isdifferent from the second conductive layer.
 2. The display apparatusaccording to claim 1, wherein a part of the first bypass portionoverlaps a part of the second bypass portion.
 3. The display apparatusaccording to claim 1, wherein the first image signal line is adjacent tothe second image signal line, the first extension portion is adjacent tothe second extension portion in the first direction, and the firstbypass portion is adjacent to the second bypass portion in the seconddirection.
 4. The display apparatus according to claim 3, wherein theplurality of image signal lines further include a third image signalline, the third image signal line has a third extension portion and athird bypass portion connected to the third extension portion, the thirdextension portion extends from the display area to the frame region, thethird bypass portion extends along the edge of the outer edge of thetransparent region in the frame region, and the third extension portionand the third bypass portion are formed in the second conductive layer.5. The display apparatus according to claim 4, wherein the third imagesignal line is adjacent to the second image signal line, the secondimage signal line is between the first image signal line and the thirdimage signal line, the third extension portion is adjacent to the secondextension portion in the first direction, the second extension portionis between the first extension portion and the third extension portionin the first direction, the third bypass portion is adjacent to thesecond bypass portion in the second direction, the second bypass portionis between the first bypass portion and the third bypass portion in thesecond direction, and a part of the first bypass portion overlaps thesecond bypass portion, and a part of the third bypass portion overlapsthe second bypass portion.
 6. The display apparatus according to claim 1wherein an insulating film is between the second conductive layer andthe conductive layer that is different from the second conductive layer,and the second extension portion is connected to the second bypassportion via a contact hole formed in the insulating layer.
 7. Thedisplay apparatus according to claim 6, wherein the insulating film isan organic insulating film.
 8. The display apparatus according to claim1, wherein the conductive layer that is different from the secondconductive layer is a third conductive layer that is different form thefirst conductive layer and the second conductive layer.
 9. The displayapparatus according to claim 6, wherein the second bypass portioninclude an extension portion, the extension portion of the second bypassportion extends in parallel to the first extension portion, and theextension portion of the second bypass portion is connected to thesecond extension portion via the contact hole.